{
  "paper": {
    "school": "Maha Bodhi",
    "year": 2025,
    "level": "P4",
    "label": "Weighted Assessment 1",
    "source_prefix": "Maha Bodhi 2025 P4 Weighted Assessment 1",
    "has_answer_key": true
  },
  "questions": [
    {
      "n": 1,
      "type_id": 1,
      "question": "Ninety-four thousand, eight hundred and seven, written in numeral is",
      "answer0": "90 487",
      "answer1": "94 087",
      "answer2": "94 807",
      "answer3": "94 870",
      "correct_answer": 2,
      "skill_id": 106,
      "difficulty_id": 1,
      "explanation": "Ninety-four thousand = 94 000; eight hundred = 800; and seven = 7. So $$94000 + 800 + 7 = 94807$$. The numeral is 94 807.",
      "hints": ["Break it into thousands, hundreds, tens and ones.", "94 thousand is 94 000; add 807."],
      "source": "Maha Bodhi 2025 P4 Weighted Assessment 1 Q1",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: option 3 (94 807)."
    },
    {
      "n": 2,
      "type_id": 1,
      "question": "Which of the following is a common factor of 4 and 8?",
      "answer0": "32",
      "answer1": "16",
      "answer2": "6",
      "answer3": "4",
      "correct_answer": 3,
      "skill_id": 113,
      "difficulty_id": 1,
      "explanation": "Factors of 4: 1, 2, 4. Factors of 8: 1, 2, 4, 8. A common factor must divide BOTH numbers. Among the options, only 4 divides both 4 and 8. So the answer is 4.",
      "hints": ["A factor must divide the number exactly.", "List the factors of 4, then check which option is also a factor of 8."],
      "source": "Maha Bodhi 2025 P4 Weighted Assessment 1 Q2",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: option 4 (value 4)."
    },
    {
      "n": 3,
      "type_id": 1,
      "question": "Mrs Lim recorded the number of books her pupils borrowed for the week. How many books did the pupils borrow on Monday and Tuesday?",
      "answer0": "50",
      "answer1": "13",
      "answer2": "7",
      "answer3": "6",
      "correct_answer": 1,
      "skill_id": 147,
      "difficulty_id": 1,
      "explanation": "From the table, Monday = 6 books and Tuesday = 7 books. Total = $$6 + 7 = 13$$ books.",
      "hints": ["Read the Monday and Tuesday columns.", "Add the two values together."],
      "source": "Maha Bodhi 2025 P4 Weighted Assessment 1 Q3",
      "image_needed": true,
      "image_options": false,
      "image_file": "q3.png",
      "image_page": 2,
      "image_bbox": [0.20, 0.18, 0.92, 0.25],
      "image_loc": "data table near top of page (Days / Number of books for Mon-Fri)",
      "notes": "Table: Mon 6, Tue 7, Wed 19, Thu 13, Fri 5. Key: option 2 (13)."
    },
    {
      "n": 4,
      "type_id": 1,
      "question": "There were 40 children queuing to enter a room. Every 4th child in the queue received a toy and every 5th child received a sweet. How many children received both a toy and a sweet?",
      "answer0": "1",
      "answer1": "2",
      "answer2": "9",
      "answer3": "20",
      "correct_answer": 1,
      "skill_id": 115,
      "difficulty_id": 2,
      "explanation": "A child gets both if their position is a common multiple of 4 and 5, i.e. a multiple of 20. Within 40, these are positions 20 and 40. So 2 children received both.",
      "hints": ["Both a toy and a sweet means the position must be a multiple of both 4 and 5.", "Find the multiples of 20 that are 40 or less."],
      "source": "Maha Bodhi 2025 P4 Weighted Assessment 1 Q4",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: option 2 (2)."
    },
    {
      "n": 5,
      "type_id": 1,
      "question": "If you add 1 to a certain number and round it to the nearest ten, the answer is 1950. If you add 2 to the number and round it to the nearest ten, the answer is 1960. What is the number?",
      "answer0": "1951",
      "answer1": "1952",
      "answer2": "1953",
      "answer3": "1958",
      "correct_answer": 2,
      "skill_id": 109,
      "difficulty_id": 3,
      "explanation": "Try 1953: $$1953 + 1 = 1954$$, which rounds to 1950. $$1953 + 2 = 1955$$, which rounds to 1960. Both conditions are satisfied, so the number is 1953.",
      "hints": ["Test each option by adding 1, then adding 2, and rounding each result.", "1954 rounds down to 1950; 1955 rounds up to 1960."],
      "source": "Maha Bodhi 2025 P4 Weighted Assessment 1 Q5",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Stray box/lines next to options are scan artefacts, not part of the question. Key: option 3 (1953)."
    },
    {
      "n": 6,
      "type_id": 2,
      "question": "What is the largest number that can be formed using the digits 4, 7, 6, and 1? [?]",
      "answer0": "7641",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 107,
      "difficulty_id": 1,
      "explanation": "To make the largest number, arrange the digits from greatest to smallest: 7, 6, 4, 1. So the largest number is 7641.",
      "hints": ["Put the biggest digit in the highest place value.", "Order the digits from largest to smallest."],
      "source": "Maha Bodhi 2025 P4 Weighted Assessment 1 Q6",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 7641."
    },
    {
      "n": 7,
      "type_id": 2,
      "question": "What is the sum of the first two multiples of 5? [?]",
      "answer0": "15",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 114,
      "difficulty_id": 1,
      "explanation": "The first two multiples of 5 are 5 and 10. Their sum is $$5 + 10 = 15$$.",
      "hints": ["The first multiples of 5 are 5, 10, 15, ...", "Add the first two of them."],
      "source": "Maha Bodhi 2025 P4 Weighted Assessment 1 Q7",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 10 + 5 = 15."
    },
    {
      "n": 8,
      "type_id": 2,
      "question": "The table shows the number of students in 3 classes. What is the total number of students in all 3 classes? [?]",
      "answer0": "120",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 118,
      "difficulty_id": 1,
      "explanation": "Add the three class sizes: $$39 + 41 + 40 = 120$$ students.",
      "hints": ["Read each class total from the table.", "Add 39, 41 and 40."],
      "source": "Maha Bodhi 2025 P4 Weighted Assessment 1 Q8",
      "image_needed": true,
      "image_options": false,
      "image_file": "q8.png",
      "image_page": 3,
      "image_bbox": [0.30, 0.57, 0.70, 0.66],
      "image_loc": "small two-column table (Class / Number of Students) in middle of page",
      "notes": "Table: 4 Joy 39, 4 Kindness 41, 4 Love 40. Key: 41 + 40 + 39 = 120."
    },
    {
      "n": 9,
      "type_id": 2,
      "question": "When rounded to the nearest hundred, the number of audience at a theatre was 2600. Write down the largest possible number of audience at the theatre. [?]",
      "answer0": "2649",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 109,
      "difficulty_id": 2,
      "explanation": "Numbers from 2550 to 2649 round to 2600 (to the nearest hundred). The largest of these is 2649.",
      "hints": ["A number rounds to 2600 if it is between 2550 and 2649.", "The largest one is just below 2650."],
      "source": "Maha Bodhi 2025 P4 Weighted Assessment 1 Q9",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 2649."
    },
    {
      "n": 10,
      "type_id": 2,
      "question": "The line graph shows Alice's savings from August to November.<br>(a) How much did she save in November? Ans: $$$[?]<br>(b) Alice earns the same amount of salary every month. In which month did she spend the most? [?]",
      "answer0": "740",
      "answer1": "September",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 148,
      "difficulty_id": 2,
      "explanation": "(a) Reading the line graph, the November point is at $740, so she saved $740. (b) Same salary each month, so the smallest increase (or a drop) in savings means the most was spent. Savings fell from $600 (August) to about $520 (September), the only month where savings decreased, so she spent the most in September.",
      "hints": ["For (a), read the savings value at November on the graph.", "For (b), the month where savings went DOWN is when she spent the most."],
      "source": "Maha Bodhi 2025 P4 Weighted Assessment 1 Q10",
      "image_needed": true,
      "image_options": false,
      "image_file": "q10.png",
      "image_page": 4,
      "image_bbox": [0.17, 0.35, 0.85, 0.58],
      "image_loc": "line graph of Amount of Savings ($) vs month (Aug-Nov), upper-middle of page",
      "notes": "Two answer blanks (a)=740, (b)=September. Graph values approx: Aug 600, Sep 520, Oct 850, Nov 740. Key: a) $740, b) September."
    },
    {
      "n": 11,
      "type_id": 2,
      "question": "Sarah sold a total of 20 bowls and plates for $86. Each bowl was sold at $5 and each plate was sold at $3. How many bowls did Sarah sell? [?]",
      "answer0": "13",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 118,
      "difficulty_id": 2,
      "explanation": "If all 20 were plates: $$20 \\times 3 = 60$$ dollars. The actual total is $86, which is $$86 - 60 = 26$$ more. Each bowl is $$5 - 3 = 2$$ dollars more than a plate, so number of bowls = $$26 \\div 2 = 13$$. Sarah sold 13 bowls.",
      "hints": ["Assume all 20 items are plates and find the total, then compare to $86.", "Each swap from plate to bowl adds $2 to the total."],
      "source": "Maha Bodhi 2025 P4 Weighted Assessment 1 Q11",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Bowl/plate price labels are decorative only; values are in the stem. Key: 13."
    },
    {
      "n": 12,
      "type_id": 2,
      "question": "Ethan had twice as many beads as Sophie. After Ethan used 36 beads for a bracelet, Sophie had twice as many beads as Ethan. How many beads did Sophie have at first? [?]",
      "answer0": "24",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 118,
      "difficulty_id": 3,
      "explanation": "Let Sophie have 1 unit at first, so Ethan had 2 units. After using 36, Ethan had $$2\\text{ units} - 36$$, and this equals half of Sophie's, i.e. Sophie's 1 unit = $$2 \\times (2\\text{ units} - 36)$$. So $$1\\text{ unit} = 4\\text{ units} - 72$$, giving $$3\\text{ units} = 72$$, so 1 unit = 24. Sophie had 24 beads at first.",
      "hints": ["Let Sophie = 1 unit and Ethan = 2 units at first.", "After Ethan loses 36, Sophie (1 unit) is twice Ethan: 1 unit = 2 x (2 units - 36)."],
      "source": "Maha Bodhi 2025 P4 Weighted Assessment 1 Q12",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Bead-bracelet doodle is decorative only. Key working: 3 units = 72, Sophie at first = 24."
    },
    {
      "n": 13,
      "type_id": 2,
      "question": "Siti spent a total of $1400 on a bookshelf, a table and a chair. The bookshelf cost $630. The table cost $500 more than the chair.<br>(a) How much did she spend on the table and the chair altogether?<br>(b) How much did she spend on the chair? [?] [?]",
      "answer0": "770",
      "answer1": "135",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 118,
      "difficulty_id": 3,
      "explanation": "(a) Table + chair = total - bookshelf = $$1400 - 630 = 770$$ dollars. (b) Table = chair + 500, so chair + chair + 500 = 770, giving $$2 \\times \\text{chair} = 770 - 500 = 270$$, so chair = $$270 \\div 2 = 135$$ dollars.",
      "hints": ["(a) Subtract the bookshelf cost from the $1400 total.", "(b) Table and chair differ by $500; their sum is $770, so split the rest equally after removing $500."],
      "source": "Maha Bodhi 2025 P4 Weighted Assessment 1 Q13",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Two answer blanks (a)=770, (b)=135. Key: a) $770, b) $135."
    }
  ]
}